diff --git a/official/debug-helpers.lua b/official/debug-helpers.lua
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+--[[
+This file is part of darktable,
+copyright (c) 2014 Jérémy Rosen
+
+darktable is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+darktable is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with darktable.  If not, see <http://www.gnu.org/licenses/>.
+]]
+--[[
+DEBUG HELPERS
+A collection of helper functions to help debugging lua scripts.
+
+require it as
+
+dhelpers = require "official/debug-helpers"
+
+Each function is documented in its own header
+
+
+]]
+
+
+local dt = require "darktable"
+local io = require "io"
+local table = require "table"
+require "darktable.debug"
+local M = {} -- The actual content of the module
+
+--[[
+A function which prints its name and its parameters
+* name : the name of the tracepoint
+* ... : anything, will be dumped using dt.debug
+]]
+function M.tracepoint(name,...)
+  print("*****  "..name.." ****")
+  params = {...}
+  print(dt.debug.dump(params,"parameters"))
+  return ...;
+end
+
+
+
+--[[
+A function that returns a tracepoint function with the given name
+This is mainly used to debug callbacks,
+
+register_event(event, dhelpers.new_tracepoint("hit callback"))
+
+will will print the following each time the callback is called
+
+**** hit callback ****
+<all the callback's parameters dumped>
+
+]]
+function M.new_tracepoint(name) 
+  return function(...) return M.tracepoint(name,...) end
+end
+
+
+--[[
+Wrapper around debug.dump, will directly print to stdout,
+same calling covention
+]]
+
+function M.dprint(...)
+  print(dt.debug.dump(...))
+end
+
+--[[
+sets dt.debug.known to shorten all images to a single line 
+
+if you don't need to debug the content of images, this will avoid them flooding your logs
+]]
+function M.terse_dump()
+  for _,v in ipairs(dt.database) do
+    dt.debug.known[v] = tostring(v)
+  end
+end
+
+
+
+return M
+-- vim: shiftwidth=2 expandtab tabstop=2 cindent
+-- kate: tab-indents: off; indent-width 2; replace-tabs on; remove-trailing-space on;